@book{ludtke2004process,
  title={Process Centrifugal Compressors: Basics, Function, Operation, Design, Application},
  author={L{\"u}dtke, K.H.},
  isbn={9783540404279},
  lccn={2003067368},
  series={Engineering online library},
  url={https://books.google.com.br/books?id=uRvqT3PromMC},
  year={2004},
  publisher={Springer}
}

@inproceedings{sandberg2013limitations,
  title={Limitations of ASME PTC 10 in Accurately Evaluation Centrifugal Compressor Thermodynamic Performance},
  author={Sandberg, Mark E and Colby, Gary M},
  booktitle={Proceedings of the 42nd Turbomachinery Symposium},
  year={2013},
  organization={Texas A\&M University. Turbomachinery Laboratories},
  doi={10.21423/R1505Q}
}

@article{schultz1962,
    author = {Schultz, John M.},
    title = "{The Polytropic Analysis of Centrifugal Compressors}",
    journal = {Journal of Engineering for Power},
    volume = {84},
    number = {1},
    pages = {69-82},
    year = {1962},
    month = {01},
    abstract = "{The real-gas equations of polytropic analysis are derived in terms of compressibility functions X and Y which supplement the familiar compressibility factor, Z. A polytropic head factor, f, is introduced to adjust test results for deviations from perfect-gas behavior. Functions X and Y are generalized and plotted for gases in corresponding states.}",
    issn = {0022-0825},
    doi = {10.1115/1.3673381},
}

@article{huntington1985,
    author = {Huntington, R. A.},
    title = "{Evaluation of Polytropic Calculation Methods for Turbomachinery Performance}",
    journal = {Journal of Engineering for Gas Turbines and Power},
    volume = {107},
    number = {4},
    pages = {872-876},
    year = {1985},
    month = {10},
    abstract = "{Performance calculations for centrifugal compressors have been based on polytropic analysis for many years. The basic polytropic equation, in which head is found from gas pressure, temperature, and compressibility factor at the end points of compression, is applied by virtually all engineers involved with turbomachinery design, selection, or operation. The problems and errors associated with this simple calculation method when applied to nonideal gases have long been recognized. Schultz [1] proposed a correction factor to the head equation to compensate for the errors. This “polytropic head factor” correction is required by the ASME Power Test Code 10 [2] for the evaluation of compressor performance. Recently, the accuracy of even the corrected head equation has been questioned for the compression of gases to high pressures and an alternative calculation method has been proposed by Mallen and Saville [3]. Although differences were found between their method and the Schultz method of up to three percent, they did not show which method was more accurate. This paper evaluates the accuracy of these previous calculation methods and shows that both have errors for some compression calculations. In addition, a new polytropic calculation method is described and is shown to be substantially more accurate than the methods of both [1] and [3], thus allowing more precise evaluations of compressor performance.}",
    issn = {0742-4795},
    doi = {10.1115/1.3239827},
}

@article{mallen1977polytropic,
  title={Polytropic processes in the performance prediction of centrifugal compressors},
  author={Mallen, M and Saville, G},
  journal={Institution of mechanical engineers, London, United Kingdom},
  pages={89--96},
  year={1977}
}

@article{huntington2017,
author = {Huntington, Richard},
year = {2017},
month = {09},
pages = {},
journal = {},
title = {Another New Look at Polytropic Calculations Methods for Turbomachinery Performance},
doi = {10.13140/RG.2.2.10331.87841}
}

@article{evans2017,
  title={Centrifugal Compressor Performance Making Enlightened Analysis Decisions},
  author={Evans, Fred and Huble, Spencer and others},
  booktitle={Proceedings of the 46th Turbomachinery Symposium},
  year={2017},
  organization={Turbomachinery Laboratory, Texas A\&M Engineering Experiment Station},
  journal = {},
  doi={https://hdl.handle.net/1969.1/166782},
}

@Misc{refprop,
Title = {{NIST Standard Reference Database 23: Reference Fluid Thermodynamic and Transport Properties-REFPROP, Version 10.0, National Institute of Standards and Technology}},
Author = {E. W. Lemmon and and Ian H. Bell and M. L. Huber and M. O. McLinden},
Year = {2018},
Doi = {http://dx.doi.org/10.18434/T4JS3C},
Url = {https://www.nist.gov/srd/refprop}
}

@article{coolprop,
    author = {Bell, Ian H. and Wronski, Jorrit and Quoilin, Sylvain and Lemort, Vincent},
    title = {Pure and Pseudo-pure Fluid Thermophysical Property Evaluation and
             the Open-Source Thermophysical Property Library CoolProp},
    journal = {Industrial \& Engineering Chemistry Research},
    volume = {53},
    number = {6},
    pages = {2498--2508},
    year = {2014},
    doi = {10.1021/ie4033999},
    URL = {http://pubs.acs.org/doi/abs/10.1021/ie4033999},
    eprint = {http://pubs.acs.org/doi/pdf/10.1021/ie4033999}
    }

@article{huntington2020,
author = {Huntington, Richard},
year = {2020},
month = {11},
pages = {},
journal = {},
title = {Polytropic Calculation Wars Are Over},
doi = {10.13140/RG.2.2.26600.90887/1}
}
